From: Christoph Hellwig <hch@lst.de>
To: David Rientjes <rientjes@google.com>
Cc: Thomas Lendacky <thomas.lendacky@amd.com>,
Brijesh Singh <brijesh.singh@amd.com>,
linux-kernel@vger.kernel.org, iommu@lists.linux-foundation.org,
Robin Murphy <robin.murphy@arm.com>,
Christoph Hellwig <hch@lst.de>
Subject: Re: [patch for-5.8 2/4] dma-direct: re-encrypt memory if dma_direct_alloc_pages() fails
Date: Mon, 15 Jun 2020 08:56:25 +0200 [thread overview]
Message-ID: <20200615065625.GB21248@lst.de> (raw)
In-Reply-To: <alpine.DEB.2.22.394.2006111219200.153880@chino.kir.corp.google.com>
On Thu, Jun 11, 2020 at 12:20:29PM -0700, David Rientjes wrote:
> If arch_dma_set_uncached() fails after memory has been decrypted, it needs
> to be re-encrypted before freeing.
>
> Fixes: fa7e2247c572 ("dma-direct: make uncached_kernel_address more
> general")
> Cc: stable@vger.kernel.org # 5.7
> Signed-off-by: David Rientjes <rientjes@google.com>
Note that this can't really happen in practice as
CONFIG_ARCH_HAS_DMA_SET_UNCACHED and memory encryption are mutally
exclusive in pracrie. Still looks ok and useful otherwise.
_______________________________________________
iommu mailing list
iommu@lists.linux-foundation.org
https://lists.linuxfoundation.org/mailman/listinfo/iommu
next prev parent reply other threads:[~2020-06-15 6:56 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-06-11 19:20 [patch for-5.8 0/4] dma-direct: dma_direct_alloc_pages() fixes for AMD SEV David Rientjes via iommu
2020-06-11 19:20 ` [patch for-5.8 1/4] dma-direct: always align allocation size in dma_direct_alloc_pages() David Rientjes via iommu
2020-06-15 6:54 ` Christoph Hellwig
2020-06-11 19:20 ` [patch for-5.8 2/4] dma-direct: re-encrypt memory if dma_direct_alloc_pages() fails David Rientjes via iommu
2020-06-15 6:56 ` Christoph Hellwig [this message]
2020-06-11 19:20 ` [patch for-5.8 3/4] dma-direct: check return value when encrypting or decrypting memory David Rientjes via iommu
2020-06-11 19:20 ` [patch for-5.8 4/4] dma-direct: add missing set_memory_decrypted() for coherent mapping David Rientjes via iommu
2020-06-15 7:00 ` Christoph Hellwig
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200615065625.GB21248@lst.de \
--to=hch@lst.de \
--cc=brijesh.singh@amd.com \
--cc=iommu@lists.linux-foundation.org \
--cc=linux-kernel@vger.kernel.org \
--cc=rientjes@google.com \
--cc=robin.murphy@arm.com \
--cc=thomas.lendacky@amd.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox